Ben has
411 as many stamps as Sam. They have a total of 300 stamps. How many stamps must Sam give to Ben so that they will have the same number of stamps?
| |
Ben |
Sam |
Total |
| Before |
4 u |
11 u |
15 u |
| Change |
+ ? |
- ? |
|
| After |
150 |
150 |
300 |
Total number of stamps
= 4 u + 11 u
= 15 u
15 u = 300
1 u = 300 ÷ 15 = 20
Number of stamps that each of them has in the end
= 300 ÷ 2
= 150
Number of stamps that Ben has
= 4 u
= 4 x 20
= 80
Number of stamps that Sam must give Ben
= 150 - 80
= 70
Answer(s): 70
